<h3>Shipping Prices</h3>

<!-- async 管道从数据流中返回最新值，并在所属组件的生命期内持续返回。当 Angular 销毁该组件时，async 管道会自动停止。 -->
 <!-- https://v15.angular.cn/api/common/AsyncPipe -->
<div class="shipping-item" *ngFor="let shipping of shippingCosts | async">
  <span>{{ shipping.type }}</span>
  <span>{{ shipping.price | currency }}</span>
</div>